Rudolf commichau



No. 626,409. Patented lune 6, |899.

R. coMMlcHAu.

SPIYRAL CONVEYEB.

19 (No Model.) (Applxcatxon med Jan. 1899 bzLZ-/zesggs lavado? y PATENTil" CE@ RUDOLF COMMIOI'IAU, OF MAGDEBURG-SUDENBURG, GERMANYi l SPIRALCONVEYER.

SPECIFICATION forming part of Letters Patent No. 626,409, dated .inne e,1899.

Application filed January 19,1899. Serial No. 702,693. (No model.)

To @ZZ whom t may concern:

Be it known that I, RUDOLF GoMMoHAU, a subject of the King of Prussia,Emperor of Germany, residing in MagdeburgSudenburg, in the Kingdom ofPrussia, Germany, have invented certain new and useful ImprovementsinSpiral Oonveyers, (for which a patent has been applied for in Germanyand which application is dated May 4, 1898,) of which the following is aspeciiication.

My invention relates to an improvement in spiral conveyers. According tothe processes of manufacture conveyers are made of separate rings, whichare punched out, slotted at the side, bent, and riveted together in thetransverse direction, and it is not possible to so fashion the outeredge (which owing to the greater peripheral speed wears away muchquicker than the inside) that the wear takes place equally over thewhole surface.

The object of my invention is to remedy' this disadvantage in `makingthe conveyers by rolling them out of straight strips of metal. For thispurpose I preferably use the rollinginachines described broadly, forinstance, in German Patents Nos. 55,692, 64,571, 21,547, and 87 ,681,and the United States Patent No.499,713, of June 20, 1893, United StatesPatent No. 368,569, of August 23, 1887, or United States Patent No.601,429,0f March 29, 1898, with this difference, however, that in orderto obtain a thickened edge the material must have a wedge-likeshapedsection and that the rollers must be capable of being adjusted in such aposition that the material receives the proper curvature and yet retainscertain taper toward the edge. The rolls themselves may be cylindricalor conical and arranged in two or more juxtaposed or superimposedgroups. Apart from the fact that the duration of conveyers constructedin this way is considerably prolonged, as in working they can be usedfor the conveyance of materials which attack the metal of the conveyer,as is the case in mills where gypsum, slag, salt, dac., aretreated,*they also possess the great advantage for other kinds of workthat both the rivets and the transverse joint, i

for the conveyance of materials, such as crystallized sugar and othersalts, ttc., which are very liable to be easily triturated or to beotherwise damaged by friction.

The mode of construction described in the foregoing renders it possibleto make the conveyers of several spiral strips riveted together alongthe direction in which the conveying motion takes place-that is to say,in such a manner that a strip of thicker material with countersunkrivets is fixed to the one attached to the shaft1 whereby the strip canbe renewed when it is Worn out and the conveyer further utilized withoutincurring great expense.

Figure 1 is a perspective View of a strip of material having awedge-like section. Fig. 2 is a View showing a machine for bending thematerial into the'spiral conveyer, and Fig. 3 is a side View of acomplete conveyer.

In said figures, A represents the strip of metal, and B B are twoconical-ended rolls, between the ends of which the material passes andby means of which it is formed into the spiral conveyer. Thisspiral-conveyer strip is then suitably mounted on a proper supportingshaft or rod O, as indicated in Fig. 3, and the spiral conveyer thusformed has the thickencd edge a.

Having described my invention, what I claim is- As a new article ofmanufacture, a spiral conveyer comprising a supporting-shaft and ametallic spiral screw-strip mounted thereon, the strip being tapering incross-section with its thickest portion at the periphery of the strip,substantially as described.

In witness whereof I have hereunto signed my name in the presence of twosubscribing witnesses.

RUDOLF COMMICHAU. Witnesses:

O. S'roRoK,

WILLY ENGER.

